Employing magnetic field to a liquid channel of nano lubricant equipped VCR system by using R134a refrigerant

Abstract

This article represents an experimental investigation accomplished to examine the impact of magnetic field on liquid channel of nano lubricant (CuO& PAG oil) equipped VCR system. This effects on energy economics in VCR system. By employing magnetic field to fluid flow, atomization of the fluid will takes place and reduces the specific volume of the fluid molecules. This drop in specific volume of fluid molecules results to loses it’s viscosity that decreases the input compressing power required by compressor, also increases heat changing rates in evaporator and condenser in behalf of raised mass flow rates of the refrigerant. Addition of nano particles to the lubricating oil of compressor enhances heat changing rates in ejector (i.e. condenser) and evaporator & by reducing frictional power leads to rise in mechanical efficiency. By this experimental study, an improvement in the performance of VCR system was noticed and the occupancy of best level of magnetic field in the presence of different volumetric compositions (0.01%, 0.015%, 0.02%, and 0.025%) of CuO nano particles to PAG oil observed. Finally by combining both magnetic and lubrication effects, the coefficient of performance of system enhanced up to 25.14% for refrigerant R134a at fourth magnetic pair among all five magnetic pairs (each 11,800 Gauss), by the application of magnetic field to liquid channel with 0.025% volumetric addition of copper-oxide nano particles (APS: 40-80 nm) to the compressor lubricating oil (PAG oil), when compared to simple VCR.